package com.peakmain.ui.utils.wheel

import android.util.Log
import java.util.*

/**
 * author:Peakmain
 * createTime:2021/5/17
 * mail:2726449200@qq.com
 * describe：实现公农历互转工具类
 */
object LunarCalendarUtil {
    /**
     * 支持转换的最小农历年份
     */
    const val MIN_YEAR = 1900

    /**
     * 支持转换的最大农历年份
     */
    const val MAX_YEAR = 2099

    /**
     * 公历每月前的天数
     */
    private val DAYS_BEFORE_MONTH = intArrayOf(
        0, 31, 59, 90, 120, 151, 181,
        212, 243, 273, 304, 334, 365
    )

    /**
     * 用来表示1900年到2099年间农历年份的相关信息，共24位bit的16进制表示，其中：
     * 1. 前4位表示该年闰哪个月；
     * 2. 5-17位表示农历年份13个月的大小月分布，0表示小，1表示大；
     * 3. 最后7位表示农历年首（正月初一）对应的公历日期。
     *
     *
     * 以2014年的数据0x955ABF为例说明：
     * 1001 0101 0101 1010 1011 1111
     * 闰九月                                  农历正月初一对应公历1月31号
     */
    private val LUNAR_INFO = intArrayOf(
        0x84B6BF,  /*1900*/
        0x04AE53,
        0x0A5748,
        0x5526BD,
        0x0D2650,
        0x0D9544,
        0x46AAB9,
        0x056A4D,
        0x09AD42,
        0x24AEB6,
        0x04AE4A,  /*1901-1910*/
        0x6A4DBE,
        0x0A4D52,
        0x0D2546,
        0x5D52BA,
        0x0B544E,
        0x0D6A43,
        0x296D37,
        0x095B4B,
        0x749BC1,
        0x049754,  /*1911-1920*/
        0x0A4B48,
        0x5B25BC,
        0x06A550,
        0x06D445,
        0x4ADAB8,
        0x02B64D,
        0x095742,
        0x2497B7,
        0x04974A,
        0x664B3E,  /*1921-1930*/
        0x0D4A51,
        0x0EA546,
        0x56D4BA,
        0x05AD4E,
        0x02B644,
        0x393738,
        0x092E4B,
        0x7C96BF,
        0x0C9553,
        0x0D4A48,  /*1931-1940*/
        0x6DA53B,
        0x0B554F,
        0x056A45,
        0x4AADB9,
        0x025D4D,
        0x092D42,
        0x2C95B6,
        0x0A954A,
        0x7B4ABD,
        0x06CA51,  /*1941-1950*/
        0x0B5546,
        0x555ABB,
        0x04DA4E,
        0x0A5B43,
        0x352BB8,
        0x052B4C,
        0x8A953F,
        0x0E9552,
        0x06AA48,
        0x6AD53C,  /*1951-1960*/
        0x0AB54F,
        0x04B645,
        0x4A5739,
        0x0A574D,
        0x052642,
        0x3E9335,
        0x0D9549,
        0x75AABE,
        0x056A51,
        0x096D46,  /*1961-1970*/
        0x54AEBB,
        0x04AD4F,
        0x0A4D43,
        0x4D26B7,
        0x0D254B,
        0x8D52BF,
        0x0B5452,
        0x0B6A47,
        0x696D3C,
        0x095B50,  /*1971-1980*/
        0x049B45,
        0x4A4BB9,
        0x0A4B4D,
        0xAB25C2,
        0x06A554,
        0x06D449,
        0x6ADA3D,
        0x0AB651,
        0x095746,
        0x5497BB,  /*1981-1990*/
        0x04974F,
        0x064B44,
        0x36A537,
        0x0EA54A,
        0x86B2BF,
        0x05AC53,
        0x0AB647,
        0x5936BC,
        0x092E50,
        0x0C9645,  /*1991-2000*/
        0x4D4AB8,
        0x0D4A4C,
        0x0DA541,
        0x25AAB6,
        0x056A49,
        0x7AADBD,
        0x025D52,
        0x092D47,
        0x5C95BA,
        0x0A954E,  /*2001-2010*/
        0x0B4A43,
        0x4B5537,
        0x0AD54A,
        0x955ABF,
        0x04BA53,
        0x0A5B48,
        0x652BBC,
        0x052B50,
        0x0A9345,
        0x474AB9,  /*2011-2020*/
        0x06AA4C,
        0x0AD541,
        0x24DAB6,
        0x04B64A,
        0x6a573D,
        0x0A4E51,
        0x0D2646,
        0x5E933A,
        0x0D534D,
        0x05AA43,  /*2021-2030*/
        0x36B537,
        0x096D4B,
        0xB4AEBF,
        0x04AD53,
        0x0A4D48,
        0x6D25BC,
        0x0D254F,
        0x0D5244,
        0x5DAA38,
        0x0B5A4C,  /*2031-2040*/
        0x056D41,
        0x24ADB6,
        0x049B4A,
        0x7A4BBE,
        0x0A4B51,
        0x0AA546,
        0x5B52BA,
        0x06D24E,
        0x0ADA42,
        0x355B37,  /*2041-2050*/
        0x09374B,
        0x8497C1,
        0x049753,
        0x064B48,
        0x66A53C,
        0x0EA54F,
        0x06AA44,
        0x4AB638,
        0x0AAE4C,
        0x092E42,  /*2051-2060*/
        0x3C9735,
        0x0C9649,
        0x7D4ABD,
        0x0D4A51,
        0x0DA545,
        0x55AABA,
        0x056A4E,
        0x0A6D43,
        0x452EB7,
        0x052D4B,  /*2061-2070*/
        0x8A95BF,
        0x0A9553,
        0x0B4A47,
        0x6B553B,
        0x0AD54F,
        0x055A45,
        0x4A5D38,
        0x0A5B4C,
        0x052B42,
        0x3A93B6,  /*2071-2080*/
        0x069349,
        0x7729BD,
        0x06AA51,
        0x0AD546,
        0x54DABA,
        0x04B64E,
        0x0A5743,
        0x452738,
        0x0D264A,
        0x8E933E,  /*2081-2090*/
        0x0D5252,
        0x0DAA47,
        0x66B53B,
        0x056D4F,
        0x04AE45,
        0x4A4EB9,
        0x0A4D4C,
        0x0D1541,
        0x2D92B5 /*2091-2099*/
    )
    private val solar_1_1 = intArrayOf(
        1887, 0xec04c, 0xec23f, 0xec435, 0xec649,
        0xec83e, 0xeca51, 0xecc46, 0xece3a, 0xed04d, 0xed242, 0xed436,
        0xed64a, 0xed83f, 0xeda53, 0xedc48, 0xede3d, 0xee050, 0xee244,
        0xee439, 0xee64d, 0xee842, 0xeea36, 0xeec4a, 0xeee3e, 0xef052,
        0xef246, 0xef43a, 0xef64e, 0xef843, 0xefa37, 0xefc4b, 0xefe41,
        0xf0054, 0xf0248, 0xf043c, 0xf0650, 0xf0845, 0xf0a38, 0xf0c4d,
        0xf0e42, 0xf1037, 0xf124a, 0xf143e, 0xf1651, 0xf1846, 0xf1a3a,
        0xf1c4e, 0xf1e44, 0xf2038, 0xf224b, 0xf243f, 0xf2653, 0xf2848,
        0xf2a3b, 0xf2c4f, 0xf2e45, 0xf3039, 0xf324d, 0xf3442, 0xf3636,
        0xf384a, 0xf3a3d, 0xf3c51, 0xf3e46, 0xf403b, 0xf424e, 0xf4443,
        0xf4638, 0xf484c, 0xf4a3f, 0xf4c52, 0xf4e48, 0xf503c, 0xf524f,
        0xf5445, 0xf5639, 0xf584d, 0xf5a42, 0xf5c35, 0xf5e49, 0xf603e,
        0xf6251, 0xf6446, 0xf663b, 0xf684f, 0xf6a43, 0xf6c37, 0xf6e4b,
        0xf703f, 0xf7252, 0xf7447, 0xf763c, 0xf7850, 0xf7a45, 0xf7c39,
        0xf7e4d, 0xf8042, 0xf8254, 0xf8449, 0xf863d, 0xf8851, 0xf8a46,
        0xf8c3b, 0xf8e4f, 0xf9044, 0xf9237, 0xf944a, 0xf963f, 0xf9853,
        0xf9a47, 0xf9c3c, 0xf9e50, 0xfa045, 0xfa238, 0xfa44c, 0xfa641,
        0xfa836, 0xfaa49, 0xfac3d, 0xfae52, 0xfb047, 0xfb23a, 0xfb44e,
        0xfb643, 0xfb837, 0xfba4a, 0xfbc3f, 0xfbe53, 0xfc048, 0xfc23c,
        0xfc450, 0xfc645, 0xfc839, 0xfca4c, 0xfcc41, 0xfce36, 0xfd04a,
        0xfd23d, 0xfd451, 0xfd646, 0xfd83a, 0xfda4d, 0xfdc43, 0xfde37,
        0xfe04b, 0xfe23f, 0xfe453, 0xfe648, 0xfe83c, 0xfea4f, 0xfec44,
        0xfee38, 0xff04c, 0xff241, 0xff436, 0xff64a, 0xff83e, 0xffa51,
        0xffc46, 0xffe3a, 0x10004e, 0x100242, 0x100437, 0x10064b, 0x100841,
        0x100a53, 0x100c48, 0x100e3c, 0x10104f, 0x101244, 0x101438,
        0x10164c, 0x101842, 0x101a35, 0x101c49, 0x101e3d, 0x102051,
        0x102245, 0x10243a, 0x10264e, 0x102843, 0x102a37, 0x102c4b,
        0x102e3f, 0x103053, 0x103247, 0x10343b, 0x10364f, 0x103845,
        0x103a38, 0x103c4c, 0x103e42, 0x104036, 0x104249, 0x10443d,
        0x104651, 0x104846, 0x104a3a, 0x104c4e, 0x104e43, 0x105038,
        0x10524a, 0x10543e, 0x105652, 0x105847, 0x105a3b, 0x105c4f,
        0x105e45, 0x106039, 0x10624c, 0x106441, 0x106635, 0x106849,
        0x106a3d, 0x106c51, 0x106e47, 0x10703c, 0x10724f, 0x107444,
        0x107638, 0x10784c, 0x107a3f, 0x107c53, 0x107e48
    )
    private val lunar_month_days = intArrayOf(
        1887, 0x1694, 0x16aa, 0x4ad5,
        0xab6, 0xc4b7, 0x4ae, 0xa56, 0xb52a, 0x1d2a, 0xd54, 0x75aa, 0x156a,
        0x1096d, 0x95c, 0x14ae, 0xaa4d, 0x1a4c, 0x1b2a, 0x8d55, 0xad4,
        0x135a, 0x495d, 0x95c, 0xd49b, 0x149a, 0x1a4a, 0xbaa5, 0x16a8,
        0x1ad4, 0x52da, 0x12b6, 0xe937, 0x92e, 0x1496, 0xb64b, 0xd4a,
        0xda8, 0x95b5, 0x56c, 0x12ae, 0x492f, 0x92e, 0xcc96, 0x1a94,
        0x1d4a, 0xada9, 0xb5a, 0x56c, 0x726e, 0x125c, 0xf92d, 0x192a,
        0x1a94, 0xdb4a, 0x16aa, 0xad4, 0x955b, 0x4ba, 0x125a, 0x592b,
        0x152a, 0xf695, 0xd94, 0x16aa, 0xaab5, 0x9b4, 0x14b6, 0x6a57,
        0xa56, 0x1152a, 0x1d2a, 0xd54, 0xd5aa, 0x156a, 0x96c, 0x94ae,
        0x14ae, 0xa4c, 0x7d26, 0x1b2a, 0xeb55, 0xad4, 0x12da, 0xa95d,
        0x95a, 0x149a, 0x9a4d, 0x1a4a, 0x11aa5, 0x16a8, 0x16d4, 0xd2da,
        0x12b6, 0x936, 0x9497, 0x1496, 0x1564b, 0xd4a, 0xda8, 0xd5b4,
        0x156c, 0x12ae, 0xa92f, 0x92e, 0xc96, 0x6d4a, 0x1d4a, 0x10d65,
        0xb58, 0x156c, 0xb26d, 0x125c, 0x192c, 0x9a95, 0x1a94, 0x1b4a,
        0x4b55, 0xad4, 0xf55b, 0x4ba, 0x125a, 0xb92b, 0x152a, 0x1694,
        0x96aa, 0x15aa, 0x12ab5, 0x974, 0x14b6, 0xca57, 0xa56, 0x1526,
        0x8e95, 0xd54, 0x15aa, 0x49b5, 0x96c, 0xd4ae, 0x149c, 0x1a4c,
        0xbd26, 0x1aa6, 0xb54, 0x6d6a, 0x12da, 0x1695d, 0x95a, 0x149a,
        0xda4b, 0x1a4a, 0x1aa4, 0xbb54, 0x16b4, 0xada, 0x495b, 0x936,
        0xf497, 0x1496, 0x154a, 0xb6a5, 0xda4, 0x15b4, 0x6ab6, 0x126e,
        0x1092f, 0x92e, 0xc96, 0xcd4a, 0x1d4a, 0xd64, 0x956c, 0x155c,
        0x125c, 0x792e, 0x192c, 0xfa95, 0x1a94, 0x1b4a, 0xab55, 0xad4,
        0x14da, 0x8a5d, 0xa5a, 0x1152b, 0x152a, 0x1694, 0xd6aa, 0x15aa,
        0xab4, 0x94ba, 0x14b6, 0xa56, 0x7527, 0xd26, 0xee53, 0xd54, 0x15aa,
        0xa9b5, 0x96c, 0x14ae, 0x8a4e, 0x1a4c, 0x11d26, 0x1aa4, 0x1b54,
        0xcd6a, 0xada, 0x95c, 0x949d, 0x149a, 0x1a2a, 0x5b25, 0x1aa4,
        0xfb52, 0x16b4, 0xaba, 0xa95b, 0x936, 0x1496, 0x9a4b, 0x154a,
        0x136a5, 0xda4, 0x15ac
    )

    /**
     * 将农历日期转换为公历日期
     *
     * @param year        农历年份
     * @param month       农历月
     * @param monthDay    农历日
     * @param isLeapMonth 该月是否是闰月
     * @return 返回农历日期对应的公历日期，year0, month1, day2.
     */
    fun lunarToSolar(
        year: Int, month: Int, monthDay: Int,
        isLeapMonth: Boolean
    ): IntArray {
        var year = year
        require(!(year < MIN_YEAR || year > MAX_YEAR || month < 1 || month > 12 || monthDay < 1 || monthDay > 30)) {
            """Illegal lunar date, must be like that:
	year : 1900~2099
	month : 1~12
	day : 1~30"""
        }
        var dayOffset: Int = (LUNAR_INFO[year - MIN_YEAR] and 0x001F) - 1
        if (LUNAR_INFO[year - MIN_YEAR] and 0x0060 shr 5 == 2) dayOffset += 31
        var i = 1
        while (i < month) {
            dayOffset += if (LUNAR_INFO[year - MIN_YEAR] and (0x80000 shr i - 1) == 0) 29 else 30
            i++
        }
        dayOffset += monthDay
        val leapMonth: Int = LUNAR_INFO[year - MIN_YEAR] and 0xf00000 shr 20

        // 这一年有闰月
        if (leapMonth != 0) {
            if (month > leapMonth || month == leapMonth && isLeapMonth) {
                dayOffset += if (LUNAR_INFO[year - MIN_YEAR] and (0x80000 shr month - 1) == 0) 29 else 30
            }
        }
        if (dayOffset > 366 || year % 4 != 0 && dayOffset > 365) {
            year += 1
            dayOffset -= if (year % 4 == 1) 366 else 365
        }
        val solarInfo = IntArray(3)
        i = 1
        while (i < 13) {
            var iPos = DAYS_BEFORE_MONTH[i]
            if (year % 4 == 0 && i > 2) {
                iPos += 1
            }
            if (year % 4 == 0 && i == 2 && iPos + 1 == dayOffset) {
                solarInfo[1] = i
                solarInfo[2] = dayOffset - 31
                break
            }
            if (iPos >= dayOffset) {
                solarInfo[1] = i
                iPos = DAYS_BEFORE_MONTH[i - 1]
                if (year % 4 == 0 && i > 2) {
                    iPos += 1
                }
                if (dayOffset > iPos) solarInfo[2] =
                    dayOffset - iPos else if (dayOffset == iPos) {
                    if (year % 4 == 0 && i == 2) solarInfo[2] =
                        DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1] + 1 else solarInfo[2] =
                        DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1]
                } else solarInfo[2] = dayOffset
                break
            }
            i++
        }
        solarInfo[0] = year
        return solarInfo
    }

    fun solarToLunar(year: Int, month: Int, monthDay: Int): IntArray {
        val lunarDate = IntArray(4)
        var index = year - solar_1_1[0]
        val data = (year shl 9 or (month shl 5)
                or monthDay)
        var solar11 = 0
        if (solar_1_1[index] > data) {
            index--
        }
        solar11 = solar_1_1[index]
        val y = getBitInt(solar11, 12, 9)
        val m = getBitInt(solar11, 4, 5)
        val d = getBitInt(solar11, 5, 0)
        var offset = solarToInt(
            year, month,
            monthDay
        ) - solarToInt(y, m, d)
        val days = lunar_month_days[index]
        val leap = getBitInt(days, 4, 13)
        val lunarY = index + solar_1_1[0]
        var lunarM = 1
        var lunarD = 1
        offset += 1
        for (i in 0..12) {
            val dm = if (getBitInt(days, 1, 12 - i) == 1) 30 else 29
            offset -= if (offset > dm) {
                lunarM++
                dm.toLong()
            } else {
                break
            }
        }
        lunarD = offset.toInt()
        lunarDate[0] = lunarY
        lunarDate[1] = lunarM
        var isLeap = false
        if (leap != 0 && lunarM > leap) {
            lunarDate[1] = lunarM - 1
            if (lunarM == leap + 1) {
                isLeap = true
            }
        }
        lunarDate[2] = lunarD
        lunarDate[3] = if (isLeap) 1 else 0
        //Log.i("----------->",year+"-"+month+"-"+monthDay+"====>"+lunarDate[0]+"-"+lunarDate[1]+"-"+lunarDate[2]+"-"+lunarDate[3]);
        return lunarDate
    }

    /**
     * 将公历日期转换为农历日期，且标识是否是闰月
     *
     * @param year
     * @param month
     * @param monthDay
     * @return 返回公历日期对应的农历日期，year0，month1，day2，leap3
     */
    @Deprecated("不准确")
    fun solarToLunarDeprecated(year: Int, month: Int, monthDay: Int): IntArray {
        val lunarDate = IntArray(4)
        val baseDate = GregorianCalendar(1900, 0, 31).time
        val objDate =
            GregorianCalendar(year, month - 1, monthDay).time
        var offset = ((objDate.time - baseDate.time) / 86400000L).toInt()

        // 用offset减去每农历年的天数计算当天是农历第几天
        // iYear最终结果是农历的年份, offset是当年的第几天
        var daysOfYear = 0
        var iYear: Int = MIN_YEAR
        while (iYear <= MAX_YEAR && offset > 0) {
            daysOfYear = daysInLunarYear(iYear)
            offset -= daysOfYear
            iYear++
        }
        if (offset < 0) {
            offset += daysOfYear
            iYear--
        }

        // 农历年份
        lunarDate[0] = iYear
        val leapMonth = leapMonth(iYear) // 闰哪个月,1-12
        var isLeap = false
        // 用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
                                                         var daysOfMonth = 0
        var iMonth = 1
        while (iMonth <= 13 && offset > 0) {
            daysOfMonth = daysInLunarMonth(iYear, iMonth)
            offset -= daysOfMonth
            iMonth++
        }
        // 当前月超过闰月，要校正
        if (leapMonth != 0 && iMonth > leapMonth) {
            --iMonth
            Log.i(
                "----------->",
                "$year-$month-$monthDay====>$iMonth-$leapMonth"
            )
            if (iMonth == leapMonth) {
                isLeap = true
            }
        }
        // offset小于0时，也要校正
        if (offset < 0) {
            offset += daysOfMonth
            --iMonth
        }
        lunarDate[1] = iMonth
        lunarDate[2] = offset + 1
        lunarDate[3] = if (isLeap) 1 else 0

        //Log.i("----------->",year+"-"+month+"-"+monthDay+"====>"+lunarDate[0]+"-"+lunarDate[1]+"-"+lunarDate[2]+"-"+lunarDate[3]);
        return lunarDate
    }
    /**
     * 传回农历year年month月的总天数
     *
     * @param year  要计算的年份
     * @param month 要计算的月
     * @return 传回天数
     */
    @JvmOverloads
    fun daysInMonth(year: Int, month: Int, leap: Boolean = false): Int {
        val leapMonth = leapMonth(year)
        var offset = 0

        // 如果本年有闰月且month大于闰月时，需要校正
        if (leapMonth != 0 && month > leapMonth) {
            offset = 1
        }

        // 不考虑闰月
        if (!leap) {
            return daysInLunarMonth(year, month + offset)
        } else {
            // 传入的闰月是正确的月份
            if (leapMonth != 0 && leapMonth == month) {
                return daysInLunarMonth(year, month + 1)
            }
        }
        return 0
    }

    /**
     * 传回农历 year年的总天数
     *
     * @param year 将要计算的年份
     * @return 返回传入年份的总天数
     */
    private fun daysInLunarYear(year: Int): Int {
        var i: Int
        var sum = 348
        if (leapMonth(year) != 0) {
            sum = 377
        }
        val monthInfo =
            LUNAR_INFO[year - MIN_YEAR] and 0x0FFF80
        i = 0x80000
        while (i > 0x7) {
            if (monthInfo and i != 0) sum += 1
            i = i shr 1
        }
        return sum
    }

    /**
     * 传回农历 year年month月的总天数，总共有13个月包括闰月
     *
     * @param year  将要计算的年份
     * @param month 将要计算的月份
     * @return 传回农历 year年month月的总天数
     */
    private fun daysInLunarMonth(year: Int, month: Int): Int {
        return if (LUNAR_INFO[year - MIN_YEAR] and (0x100000 shr month) == 0) 29 else 30
    }

    /**
     * 传回农历 year年闰哪个月 1-12 , 没闰传回 0
     *
     * @param year 将要计算的年份
     * @return 传回农历 year年闰哪个月1-12, 没闰传回 0
     */
    fun leapMonth(year: Int): Int {
        return LUNAR_INFO[year - MIN_YEAR] and 0xF00000 shr 20
    }

    private fun getBitInt(data: Int, length: Int, shift: Int): Int {
        return data and ((1 shl length) - 1 shl shift) shr shift
    }

    private fun solarToInt(y: Int, m: Int, d: Int): Long {
        var y = y
        var m = m
        m = (m + 9) % 12
        y -= m / 10
        return (365 * y + y / 4 - y / 100 + y / 400 + (m * 306 + 5) / 10 + (d - 1)).toLong()
    }
}